US tariffs on $200 billion worth of Chinese goods and retaliatory tariffs by Beijing on $60 billion worth of USA products took effect at midday Asian time, though the initial level of the duties was not as high as earlier feared. Meanwhile, $US110 billion of goods from the US will become subject to Chinese retaliatory tariffs around the same time.
The conflict stems from US complaints Beijing steals or pressures foreign companies to hand over technology.
Pompeo said that President Donald Trump "very much likes" his Chinese counterpart Xi Jinping but said he would press policies that "the American workers deserve".
It contains 36,000 Chinese characters and condemns the United States for starting the trade war. But they have rejected pressure to change industry plans the communist leadership sees as a path to prosperity and global influence.
China, which has accused Washington of being insincere in the negotiations, has decided not to send Vice Premier Liu He to Washington this week, The Wall Street Journal reported late last week. The Chinese government had given no public indication whether it would accept the invitation.
Previous talks in late August led to little progress.
Tropical Storm Kirk forms off African coast
The storm is expected to reach the Lesser Antilles still at tropical storm strength by Friday, though some weakening is expected. They have maximum sustained winds of 25 mph and are about 350 miles east-northeast of the Windward Islands.
With no settlement in sight, forecasters say the conflict between the two biggest economies could trim global growth through 2020. The ratings firm downgraded its world growth forecast for 2019 by 0.1 percentage point to 3.1 per cent and warned of further downside risks.
The pair have slapped tit-for-tat tariffs on $50 billion ($A68 billion) worth of goods since the trade war kicked off. He has accused the country of stealing intellectual property from American businesses, among other trade infractions. American regulators tried to limit the public impact by focusing on industrial machinery and components, but the latest $200 billion list includes bicycles, wooden furniture and other consumer goods.
That would cover almost everything China sells to the United States.
The United States and China imposed fresh tariffs on each other's goods on Monday, as the world's biggest economies showed no signs of backing down from an increasing bitter trade dispute that is expected to knock global economic growth. Beijing believes substantive negotiations will only be possible after the US midterm elections in November, Bloomberg News reported.
Chinese leaders have tried without success to recruit as allies German, France, South Korea and other trading partners that echo US complaints about Chinese market barriers and industry plans but criticize Trump's approach. The rate will increase to 25 percent by the end of the year.
LONDON - European and Asian markets were lower on Monday after China said it won't negotiate with the USA on trade if the Trump administration continues to threaten higher tariffs.
Secretary of State Mike Pompeo vowed that the United States would emerge victorious in an intensifying trade war with China, a day before Washington imposes $200 billion (R2 863 300 000 000,00) worth of tariffs.